(Rachel)
I've been cheated by you since I don't know when
So I've made up my mind it must come to an end
Mmm, look at me now, will I ever learn?
I don't know how, but I suddenly lose control
There's a fire within my soul

Just one look and I can hear a bell ring
One more look and I forget everything
Oh woah

(Rachel/Kurt/Santana)
Mamma Mia, here I go again
My, my, how can I resist ya?
Mamma Mia, does it show again?
My, my, just how much I've missed ya

(Kitty and Marley)
Yes, I've been brokenhearted
Blue since the day we parted

(Blaine and Sam with New Directions?
Why, why did I ever let you go?
Mamma Mia, now I really know
My, my, I could never let you go

(Marley)
I've been angry and sad
About things that you do

(Kitty and Marley)
I can't count all the times
That I've told you we're through

(Marley with New Directions)
And when you go, when you slam the door
I think you know that you won't be away too long
You know that I'm not that strong

(Sam with Marley and New Directions)
Just one look and I can hear a bell ring
One more look and I forget everything oh whoa

(Blaine and Rachel with Kurt, Santana, and New Directions)
Mamma Mia, here I go again
My, my, how can I resist ya?
Mamma Mia, does it show again?
My, my, just how much I've missed ya

(Rachel and Santana)
Yes, I've been brokenhearted
Blue since the day we parted

(Blaine, Kurt, Marley, Rachel, and Santana with New Directions)
Why, why did I ever let you go?
Mamma Mia, even if I said
Bye, bye, leave me now or never
Mamma Mia, it's a game we play
Bye, bye, doesn't mean forever

Mamma Mia, here I go again
My, my, how can I resist ya?
Mamma Mia, does it show again?
My, my, just how much I've missed ya

(Marley and Unique with New Directions)
Yes, I've been brokenhearted
Blue since the day we parted

(Blaine and Marley with New Directions)
Why, why (Unique: Why)
(with Unique: Did I ever let you go)
Mamma Mia (Unique: Mamma Mia)
Now I really know
(with Unique: My, my)
I could never let you go (Unique: Oh!)